CN222269371U

CN222269371U - A frame clamping and positioning mechanism

Info

Publication number: CN222269371U
Application number: CN202420648121.6U
Authority: CN
Inventors: 姜沛; 陈维
Original assignee: Giant Electric Vehicle Kunshan Co Ltd
Current assignee: Giant Electric Vehicle Kunshan Co Ltd
Priority date: 2024-04-01
Filing date: 2024-04-01
Publication date: 2024-12-31
Anticipated expiration: 2034-04-01

Abstract

The utility model belongs to the technical field of processing of power-assisted vehicles, and discloses a clamping and positioning mechanism for a vehicle frame. The CNC boring tool comprises a base, wherein the base is arranged on the lower side of a CNC boring tool, a clamping member, a first lap joint rod and a second lap joint rod are installed on the base, the clamping member comprises an air cylinder and a pressure joint piece, the air cylinder is fixed on the base, the air cylinder drives the pressure joint piece to move perpendicular to the plane of the base, a five-way part of a frame is placed on the lower side of the pressure joint piece, a middle pipe of the frame is lapped on the first lap joint rod, a main beam of the frame is lapped on the second lap joint rod, the pressure joint piece is L-shaped, a first opening is formed on the upper side of the pressure joint piece, an annular pressure joint block is installed on the pressure joint piece, the pressure joint block is abutted with the five-way part, a second opening is formed on the pressure joint block, the CNC boring tool sequentially penetrates through the first opening and the second opening, and the problem that a threaded hole error of a five-way part is processed in the prior art is high is solved.

Description

Frame clamping and positioning mechanism

Technical Field

The utility model relates to the technical field of processing of power assisted vehicles, in particular to a clamping and positioning mechanism for a vehicle frame.

Background

In the manufacturing process of the electric power-assisted bicycle, the five-way part of the electric power-assisted bicycle needs to be precisely machined, the five-way part is positioned at the rotating shaft of the pedal of the bicycle frame, and a through hole with threads needs to be machined in the five-way part at the bottommost end of the bicycle frame.

Under the prior art, place the frame perpendicular to horizontal plane, anchor clamps are in the frame bottom, press from both sides tight with the both sides of frame, fix the frame, processing cutter is transversely pegged graft from the frame left and right sides and is processed in five-way position, but because the frame is vertical to be placed, the frame self is higher from placing planar focus, press from both sides tight position and be far away from five-way position, when processing, the frame is so itself possesses certain elasticity for the metal material, the frame will rock round pressing from both sides tight position under the drive of cutter, the interval between above-mentioned tight position is far away from five-way position will lead to the frame self to rock the range is bigger, will lead to the screw thread that processes out to appear the error at last, reduce machining precision.

Disclosure of utility model

The utility model aims to provide a clamping and positioning mechanism for a vehicle frame, which solves the problem of higher error of a threaded hole for machining a five-way part in the prior art.

The utility model provides a vehicle frame clamping and positioning mechanism which comprises a base, wherein the base is arranged at the lower side of a CNC boring cutter, a clamping member, a first lapping rod and a second lapping rod are arranged on the base, the clamping member comprises an air cylinder and a crimping piece, the air cylinder is fixed on the base, the air cylinder drives the crimping piece to move perpendicular to the plane of the base, a five-way part of a vehicle frame is arranged at the lower side of the crimping piece, a middle pipe of the vehicle frame is lapped on the first lapping rod, and a main beam of the vehicle frame is lapped on the second lapping rod;

The crimping piece is L type, crimping piece upside is formed with first opening, install annular crimping piece on the crimping piece, the crimping piece with five-way portion butt, be formed with the second opening on the crimping piece, CNC boring cutter passes in proper order first opening with the second opening.

Preferably, the frame clamping and positioning mechanism further comprises a rotating disc and a fixing part, the five-way part of the frame is placed on the fixing part, the rotating disc is sleeved on the outer side of the fixing part, the rotating disc rotates around the fixing part, and the first lap joint rod is installed in a screw hole of the rotating disc through a first bolt.

Preferably, the fixing portion is provided with a first communication port, the base is provided with a second communication port, one side of the second communication port is communicated with the first communication port, and the other side of the second communication port is provided with a drain pipe.

Preferably, a first positioning hole is formed in the rotating disc, a second positioning hole is formed in the base, and the positioning pin is inserted into the first positioning hole and the second positioning hole.

Preferably, a positioning block is mounted on the first lapping rod, an arc-shaped groove is formed on the positioning block, and the middle pipe is lapped in the arc-shaped groove.

Preferably, the base is provided with a first fixing hole, the second lapping rod is provided with at least one group of second fixing holes, the second fixing holes are distributed along the length direction of the second lapping rod, and the second bolt passes through the first fixing hole and the second fixing hole and then is screwed with the second nut.

Preferably, a positioning rod is rotatably installed at the front end of the second lapping rod, the positioning rod rotates along an axis perpendicular to the base, and the positioning rod is lapped on the main beam.

Preferably, two groups of arc holes are formed in the outer side of the second opening, six groups of first through holes are circumferentially distributed in the outer side of the first opening, and the third bolt is screwed with the third nut after penetrating through the first through holes and the arc holes.

Preferably, two groups of clamping members are installed on the base, the clamping members, the first lap joint rod and the second lap joint rod are in one-to-one correspondence, a notch is formed in the edge of the base, and a fourth bolt penetrates through the notch and is connected with a fourth nut in a screwed mode after being inserted into a chute of the processing table.

The utility model has the advantages that the frame can be square on the base, meanwhile, the middle pipe and the main beam are respectively lapped on the first lapping rod and the second lapping rod to provide a plurality of groups of supporting points for the frame, so that the frame is stable in posture, the gravity center of the frame is lowered due to the square state of the frame, the shaking amplitude is reduced, the CNC boring cutter for processing the five-way part of the frame is vertically downwards processed, the CNC boring cutter passes through the press joint piece and the press joint block to carry out thread processing, the CNC boring cutter passes through the first opening and the second opening, the position of the clamping member is approximately coincident with the processing position of the CNC boring cutter, the vibration generated during processing can be restrained by the circumferential press joint block, the shaking amplitude of the frame in the processing process is reduced, the vibration can be restrained by the clamping member, the frame is clamped in the vertical direction, the vibration is restrained, and finally the vibration amplitude generated on the frame can be reduced.

Drawings

FIG. 1 is a schematic diagram of the operation of the clamping and positioning mechanism of the frame of the present utility model;

FIG. 2 is a side elevational view of the drain pipe of the vehicle frame clamping and positioning mechanism of the present utility model;

FIG. 3 is a cylinder side main view of the clamping and positioning mechanism of the frame of the present utility model.

1, A base, 11, a notch, 12, a drain pipe, 2, an air cylinder, 3, a press fitting piece, 31, a first opening, 32, a first through hole, 4, a frame, 41, a five-way part, 42, a middle pipe, 43, a main beam, 5, a first lapping rod, 51, a positioning block, 52, an arc groove, 6, a second lapping rod, 61, a positioning rod, 7, a press fitting block, 71, a second opening, 72, an arc hole, 8, a fixing part, 81, a first through hole, 9 and a rotating disc.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Under the prior art, generally place the frame on the horizontal plane vertically, set up five-way portion at the upper end, later processing cutter marches along the horizontal direction, process the screw thread to the five-way portion of frame, the bottom of frame is fixed through anchor clamps, because the processing position is farther from the clamping position, so the frame will be under the promotion of processing cutter, the frame self swings around the clamping position, will lead to the screw thread error that five-way position processed great like this, has reduced machining precision.

In order to solve the above problems, as shown in fig. 1 to 3, the present utility model provides a frame clamping and positioning mechanism, wherein a five-way part 41 of a frame 4 is machined in a manner of CNC cutting for improving machining precision, so as to improve machining precision, the frame clamping and positioning mechanism comprises a base 1, the base 1 is arranged at the lower side of a CNC boring tool, a clamping member, a first lapping rod 5 and a second lapping rod 6 are mounted on the base 1, the clamping member comprises a cylinder 2 and a crimping member 3, the cylinder 2 is fixed on the base 1, the cylinder 2 drives the crimping member 3 to move perpendicular to the plane of the base 1, the crimping member 3 is crimped on the frame 4 when moving downwards, the five-way part 41 of the frame 4 is arranged at the lower side of the crimping member 3, a middle pipe 42 of the frame 4 is lapped on the first lapping rod 5, and a main beam 43 of the frame 4 is lapped on the second lapping rod 6. The frame 4 is square on the base 1 through the cylinder 2, the first lapping rod 5 and the second lapping rod 6, wherein the press fitting piece 3 on the cylinder 2 can fix the frame 4, the first lapping rod 5 and the second lapping rod 6 can enable the frame 4 to be horizontally mounted on the base 1, the frame 4 is horizontally processed, so that vibration generated in the processing process is absorbed by the first lapping rod 5 and the second lapping rod 6, and in addition, the gravity center of the frame 4 is closer to the lowest mounting position of the frame 4, so that the vibration amplitude generated by the frame 4 in the processing process is reduced.

The crimping piece 3 is L type, and crimping piece 3 upside is formed with first opening 31, installs annular crimping piece 7 on the crimping piece 3, crimping piece 7 and five-way portion 41 butt, is formed with the second opening 71 on the crimping piece 7, and CNC boring cutter passes first opening 31 and second opening 71 in proper order.

The crimping piece 3 is L-shaped and is inverted on the base 1, the five-way part 41 of the frame 4 is arranged in the space of the lower side of the crimping piece 3, the crimping piece 3 is crimped on the edge of the five-way part 41 through the crimping block 7, the CNC boring cutter penetrates through the first opening 31 and the second opening 71 to process the interior of the five-way part 41, vibration generated by the five-way part 41 is absorbed by the crimping block 7, the vibration trend of the CNC boring cutter driving the frame 4 is directly restrained by the peripheral crimping block 7, the vibration amplitude of the frame 4 is reduced, meanwhile, the space between the position of the clamping frame 4 and the processing position of the five-way part 41 is shortened because the position of the clamping frame 4 is located in the circumferential direction of the five-way part 41, the vibration amplitude of the frame 4 is further reduced, and the precision of the CNC boring cutter for processing the threads of the five-way part 41 is higher.

The frame clamping and positioning mechanism further comprises a rotating disc 9 and a fixing part 8, the five-way part 41 of the frame 4 is placed on the fixing part 8, the rotating disc 9 is sleeved outside the fixing part 8, the rotating disc 9 rotates around the fixing part 8, and the first lap joint rod 5 is installed in a screw hole of the rotating disc 9 through a first bolt.

The position of the first lapping rod 5 can be changed by rotating the rotating disc 9, so that the first lapping rod 5 can rotate around the fixing part 8, and as the base 1 of the utility model is provided with two groups of clamping members and the corresponding first lapping rod 5 and second lapping rod 6, the base 1 can clamp two groups of frames 4 at the same time, and the processing efficiency can be improved, so that the two groups of frames 4 are simultaneously arranged on the base 1 by adjusting the positions of the two groups of first lapping rods 5, and mutual interference is avoided.

The fixed part 8 is provided with the first communication port 81, the base 1 is provided with the second communication port, one side of the second communication port is communicated with the first communication port 81, the other side of the second communication port is provided with the drain pipe 12, a large amount of cutting fluid can be sprayed out when CNC (computerized numerical control) is processed, the cutting fluid can flow out along the first communication port 81, the second communication port machine and the drain pipe 12 after passing through the five-way part 41, and the cutting fluid can be recycled, so that the waste of the cutting fluid is avoided.

The rotating disc 9 is provided with a first positioning hole, the base 1 is provided with a second positioning hole, and the positioning pin is inserted into the first positioning hole and the second positioning hole. The second positioning holes can comprise a plurality of groups, and then after the rotating disc 9 is rotated, the rotating disc 9 and the base 1 are fixed through positioning pins, so that the first lap joint rod 5 can be kept stable in the processing process.

The first lapping rod 5 is provided with a positioning block 51, an arc groove 52 is formed on the positioning block 51, and the middle pipe 42 is lapped in the arc groove 52. Because the first lapping rod 5 needs to be matched with the middle pipe 42 on the frame 4, the middle pipe 42 is placed in the arc-shaped groove 52 to limit the frame 4, and the stability of the frame 4 in the processing process is improved. The positioning block 51 is slidably mounted on the first lapping rod 5, and can be used for adapting to the frames 4 of the middle pipes 42 with different lengths, so that the universality of the frame clamping and positioning mechanism is improved.

The base 1 is provided with a first fixing hole, the second lapping rod 6 is provided with at least one group of second fixing holes, the second fixing holes are distributed along the length direction of the second lapping rod 6, and the second bolts penetrate through the first fixing holes and the second fixing holes and are connected with the second nuts in a screwed mode.

The second overlap joint pole 6 can be dismantled and connect on base 1, because the second fixed orifices includes the multiunit, so can change the mounted position of second overlap joint pole 6, can adapt to not frame 4 of equidimension through adjusting the mounted position of second overlap joint pole 6, promotes the commonality of frame centre gripping positioning mechanism.

The front end of the second lapping rod 6 is rotatably provided with a positioning rod 61, the positioning rod 61 rotates along the axis vertical to the base 1, and the positioning rod 61 is lapped with the main beam 43. Through adjusting the position of locating lever 61, make the girder 43 of frame 4 overlap joint on locating lever 61, make frame 4 and base 1 realize three-point contact, promote the stability of frame 4 at the course of working.

Two groups of arc holes 72 are formed in the outer side of the second opening 71, six groups of first through holes 32 are circumferentially distributed in the outer side of the first opening 31, and a third bolt passes through the first through holes 32 and the arc holes 72 and is screwed with a third nut.

The two groups of arc-shaped holes 72 can enable the crimping block 7 to be rotationally fixed on the crimping piece 3, so that the crimping block 7 can be stably crimped on the frames 4 with different structures, and the adaptation degree is higher.

The clamping members, the first lapping rod 5 and the second lapping rod 6 are in one-to-one correspondence, a notch 11 is formed at the edge of the base 1, and a fourth bolt is inserted into a chute of the processing table through the notch 11 and then screwed with a fourth nut.

The base 1 can change the installation position along the length direction of the chute, and then is matched with the machining section of the CNC boring cutter above, so that the mode of machining the frame 4 is more flexible.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides a frame clamping and positioning mechanism, its characterized in that includes base (1), CNC boring cutter downside is arranged in to base (1), install clamp member, first lapping rod (5) and second lapping rod (6) on base (1), clamp member includes cylinder (2) and crimping piece (3), cylinder (2) are fixed on base (1), cylinder (2) drive crimping piece (3) perpendicular to base (1) plane removes, five-way portion (41) of frame (4) are placed to crimping piece (3) downside, middle tube (42) overlap joint on first lapping rod (5) of frame (4), girder (43) overlap joint on second lapping rod (6) of frame (4);

The crimping piece (3) is L type, crimping piece (3) upside is formed with first opening (31), install annular crimping piece (7) on crimping piece (3), crimping piece (7) with five-way portion (41) butt, be formed with second opening (71) on crimping piece (7), CNC boring cutter passes in proper order first opening (31) with second opening (71).

2. The frame clamping and positioning mechanism according to claim 1, further comprising a rotating disc (9) and a fixing portion (8), wherein a five-way portion (41) of the frame (4) is placed on the fixing portion (8), the rotating disc (9) is sleeved on the outer side of the fixing portion (8), the rotating disc (9) rotates around the fixing portion (8), and the first lap joint rod (5) is installed in a screw hole of the rotating disc (9) through a first bolt.

3. The clamping and positioning mechanism for a vehicle frame according to claim 2, wherein the fixing part (8) is provided with a first communication port (81), the base (1) is provided with a second communication port, one side of the second communication port is communicated with the first communication port (81), and the other side of the second communication port is provided with a drain pipe (12).

4. The clamping and positioning mechanism for a vehicle frame according to claim 2, wherein a first positioning hole is formed in the rotating disc (9), a second positioning hole is formed in the base (1), and a positioning pin is inserted into the first positioning hole and the second positioning hole.

5. The frame clamping and positioning mechanism according to claim 1, wherein a positioning block (51) is mounted on the first lapping rod (5), an arc-shaped groove (52) is formed on the positioning block (51), and the middle pipe (42) is lapped in the arc-shaped groove (52).

6. The clamping and positioning mechanism for a vehicle frame according to claim 1, wherein the base (1) is provided with a first fixing hole, the second lapping rod (6) is provided with at least one group of second fixing holes, the second fixing holes are distributed along the length direction of the second lapping rod (6), and the second bolts penetrate through the first fixing holes and the second fixing holes and are screwed with the second nuts.

7. The frame clamping and positioning mechanism according to claim 1, wherein a positioning rod (61) is rotatably mounted at the front end of the second lapping rod (6), the positioning rod (61) rotates along an axis perpendicular to the base (1), and the positioning rod (61) is lapped on the main beam (43).

8. The frame clamping and positioning mechanism according to claim 1, wherein two groups of arc-shaped holes (72) are formed in the outer side of the second opening (71), six groups of first through holes (32) are circumferentially distributed in the outer side of the first opening (31), and a third bolt is screwed with a third nut after passing through the first through holes (32) and the arc-shaped holes (72).

9. The clamping and positioning mechanism for a vehicle frame according to claim 1, wherein two groups of clamping members are installed on the base (1), the clamping members, the first lapping rod (5) and the second lapping rod (6) are in one-to-one correspondence, a notch (11) is formed at the edge of the base (1), and a fourth bolt penetrates through the notch (11) and is inserted into a chute of a processing table to be screwed with a fourth nut.